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linux/drivers/mfd/lpc_ich.c
Mika Westerberg cd149eff8d
mtd: spi-nor: intel-spi: Disable write protection only if asked 
Currently the driver tries to disable the BIOS write protection
automatically even if this is not what the user wants. For this reason
modify the driver so that by default it does not touch the write
protection. Only if specifically asked by the user (setting writeable=1
command line parameter) the driver tries to disable the BIOS write
protection.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mauro Lima <mauro.lima@eclypsium.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220209122706.42439-2-mika.westerberg@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-02-14 12:53:08 +00:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* lpc_ich.c - LPC interface for Intel ICH
*
* LPC bridge function of the Intel ICH contains many other
* functional units, such as Interrupt controllers, Timers,
* Power Management, System Management, GPIO, RTC, and LPC
* Configuration Registers.
*
* This driver is derived from lpc_sch.
* Copyright (c) 2011 Extreme Engineering Solution, Inc.
* Author: Aaron Sierra <asierra@xes-inc.com>
*
* This driver supports the following I/O Controller hubs:
* (See the intel documentation on http://developer.intel.com.)
* document number 290655-003, 290677-014: 82801AA (ICH), 82801AB (ICHO)
* document number 290687-002, 298242-027: 82801BA (ICH2)
* document number 290733-003, 290739-013: 82801CA (ICH3-S)
* document number 290716-001, 290718-007: 82801CAM (ICH3-M)
* document number 290744-001, 290745-025: 82801DB (ICH4)
* document number 252337-001, 252663-008: 82801DBM (ICH4-M)
* document number 273599-001, 273645-002: 82801E (C-ICH)
* document number 252516-001, 252517-028: 82801EB (ICH5), 82801ER (ICH5R)
* document number 300641-004, 300884-013: 6300ESB
* document number 301473-002, 301474-026: 82801F (ICH6)
* document number 313082-001, 313075-006: 631xESB, 632xESB
* document number 307013-003, 307014-024: 82801G (ICH7)
* document number 322896-001, 322897-001: NM10
* document number 313056-003, 313057-017: 82801H (ICH8)
* document number 316972-004, 316973-012: 82801I (ICH9)
* document number 319973-002, 319974-002: 82801J (ICH10)
* document number 322169-001, 322170-003: 5 Series, 3400 Series (PCH)
* document number 320066-003, 320257-008: EP80597 (IICH)
* document number 324645-001, 324646-001: Cougar Point (CPT)
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/pci.h>
#include <linux/mfd/core.h>
#include <linux/mfd/lpc_ich.h>
#include <linux/platform_data/itco_wdt.h>
#define ACPIBASE 0x40
#define ACPIBASE_GPE_OFF 0x28
#define ACPIBASE_GPE_END 0x2f
#define ACPIBASE_SMI_OFF 0x30
#define ACPIBASE_SMI_END 0x33
#define ACPIBASE_PMC_OFF 0x08
#define ACPIBASE_PMC_END 0x0c
#define ACPIBASE_TCO_OFF 0x60
#define ACPIBASE_TCO_END 0x7f
#define ACPICTRL_PMCBASE 0x44
#define ACPIBASE_GCS_OFF 0x3410
#define ACPIBASE_GCS_END 0x3414
#define SPIBASE_BYT 0x54
#define SPIBASE_BYT_SZ 512
#define SPIBASE_BYT_EN BIT(1)
#define BYT_BCR 0xfc
#define BYT_BCR_WPD BIT(0)
#define SPIBASE_LPT 0x3800
#define SPIBASE_LPT_SZ 512
#define BCR 0xdc
#define BCR_WPD BIT(0)
#define SPIBASE_APL_SZ 4096
#define GPIOBASE_ICH0 0x58
#define GPIOCTRL_ICH0 0x5C
#define GPIOBASE_ICH6 0x48
#define GPIOCTRL_ICH6 0x4C
#define RCBABASE 0xf0
#define wdt_io_res(i) wdt_res(0, i)
#define wdt_mem_res(i) wdt_res(ICH_RES_MEM_OFF, i)
#define wdt_res(b, i) (&wdt_ich_res[(b) + (i)])
struct lpc_ich_priv {
int chipset;
int abase; /* ACPI base */
int actrl_pbase; /* ACPI control or PMC base */
int gbase; /* GPIO base */
int gctrl; /* GPIO control */
int abase_save; /* Cached ACPI base value */
int actrl_pbase_save; /* Cached ACPI control or PMC base value */
int gctrl_save; /* Cached GPIO control value */
};
static struct resource wdt_ich_res[] = {
/* ACPI - TCO */
{
.flags = IORESOURCE_IO,
},
/* ACPI - SMI */
{
.flags = IORESOURCE_IO,
},
/* GCS or PMC */
{
.flags = IORESOURCE_MEM,
},
};
static struct resource gpio_ich_res[] = {
/* GPIO */
{
.flags = IORESOURCE_IO,
},
/* ACPI - GPE0 */
{
.flags = IORESOURCE_IO,
},
};
static struct resource intel_spi_res[] = {
{
.flags = IORESOURCE_MEM,
}
};
static struct mfd_cell lpc_ich_wdt_cell = {
.name = "iTCO_wdt",
.num_resources = ARRAY_SIZE(wdt_ich_res),
.resources = wdt_ich_res,
.ignore_resource_conflicts = true,
};
static struct mfd_cell lpc_ich_gpio_cell = {
.name = "gpio_ich",
.num_resources = ARRAY_SIZE(gpio_ich_res),
.resources = gpio_ich_res,
.ignore_resource_conflicts = true,
};
static struct mfd_cell lpc_ich_spi_cell = {
.name = "intel-spi",
.num_resources = ARRAY_SIZE(intel_spi_res),
.resources = intel_spi_res,
.ignore_resource_conflicts = true,
};
/* chipset related info */
enum lpc_chipsets {
LPC_ICH = 0, /* ICH */
LPC_ICH0, /* ICH0 */
LPC_ICH2, /* ICH2 */
LPC_ICH2M, /* ICH2-M */
LPC_ICH3, /* ICH3-S */
LPC_ICH3M, /* ICH3-M */
LPC_ICH4, /* ICH4 */
LPC_ICH4M, /* ICH4-M */
LPC_CICH, /* C-ICH */
LPC_ICH5, /* ICH5 & ICH5R */
LPC_6300ESB, /* 6300ESB */
LPC_ICH6, /* ICH6 & ICH6R */
LPC_ICH6M, /* ICH6-M */
LPC_ICH6W, /* ICH6W & ICH6RW */
LPC_631XESB, /* 631xESB/632xESB */
LPC_ICH7, /* ICH7 & ICH7R */
LPC_ICH7DH, /* ICH7DH */
LPC_ICH7M, /* ICH7-M & ICH7-U */
LPC_ICH7MDH, /* ICH7-M DH */
LPC_NM10, /* NM10 */
LPC_ICH8, /* ICH8 & ICH8R */
LPC_ICH8DH, /* ICH8DH */
LPC_ICH8DO, /* ICH8DO */
LPC_ICH8M, /* ICH8M */
LPC_ICH8ME, /* ICH8M-E */
LPC_ICH9, /* ICH9 */
LPC_ICH9R, /* ICH9R */
LPC_ICH9DH, /* ICH9DH */
LPC_ICH9DO, /* ICH9DO */
LPC_ICH9M, /* ICH9M */
LPC_ICH9ME, /* ICH9M-E */
LPC_ICH10, /* ICH10 */
LPC_ICH10R, /* ICH10R */
LPC_ICH10D, /* ICH10D */
LPC_ICH10DO, /* ICH10DO */
LPC_PCH, /* PCH Desktop Full Featured */
LPC_PCHM, /* PCH Mobile Full Featured */
LPC_P55, /* P55 */
LPC_PM55, /* PM55 */
LPC_H55, /* H55 */
LPC_QM57, /* QM57 */
LPC_H57, /* H57 */
LPC_HM55, /* HM55 */
LPC_Q57, /* Q57 */
LPC_HM57, /* HM57 */
LPC_PCHMSFF, /* PCH Mobile SFF Full Featured */
LPC_QS57, /* QS57 */
LPC_3400, /* 3400 */
LPC_3420, /* 3420 */
LPC_3450, /* 3450 */
LPC_EP80579, /* EP80579 */
LPC_CPT, /* Cougar Point */
LPC_CPTD, /* Cougar Point Desktop */
LPC_CPTM, /* Cougar Point Mobile */
LPC_PBG, /* Patsburg */
LPC_DH89XXCC, /* DH89xxCC */
LPC_PPT, /* Panther Point */
LPC_LPT, /* Lynx Point */
LPC_LPT_LP, /* Lynx Point-LP */
LPC_WBG, /* Wellsburg */
LPC_AVN, /* Avoton SoC */
LPC_BAYTRAIL, /* Bay Trail SoC */
LPC_COLETO, /* Coleto Creek */
LPC_WPT_LP, /* Wildcat Point-LP */
LPC_BRASWELL, /* Braswell SoC */
LPC_LEWISBURG, /* Lewisburg */
LPC_9S, /* 9 Series */
LPC_APL, /* Apollo Lake SoC */
LPC_GLK, /* Gemini Lake SoC */
LPC_COUGARMOUNTAIN,/* Cougar Mountain SoC*/
};
static struct lpc_ich_info lpc_chipset_info[] = {
[LPC_ICH] = {
.name = "ICH",
.iTCO_version = 1,
},
[LPC_ICH0] = {
.name = "ICH0",
.iTCO_version = 1,
},
[LPC_ICH2] = {
.name = "ICH2",
.iTCO_version = 1,
},
[LPC_ICH2M] = {
.name = "ICH2-M",
.iTCO_version = 1,
},
[LPC_ICH3] = {
.name = "ICH3-S",
.iTCO_version = 1,
},
[LPC_ICH3M] = {
.name = "ICH3-M",
.iTCO_version = 1,
},
[LPC_ICH4] = {
.name = "ICH4",
.iTCO_version = 1,
},
[LPC_ICH4M] = {
.name = "ICH4-M",
.iTCO_version = 1,
},
[LPC_CICH] = {
.name = "C-ICH",
.iTCO_version = 1,
},
[LPC_ICH5] = {
.name = "ICH5 or ICH5R",
.iTCO_version = 1,
},
[LPC_6300ESB] = {
.name = "6300ESB",
.iTCO_version = 1,
},
[LPC_ICH6] = {
.name = "ICH6 or ICH6R",
.iTCO_version = 2,
.gpio_version = ICH_V6_GPIO,
},
[LPC_ICH6M] = {
.name = "ICH6-M",
.iTCO_version = 2,
.gpio_version = ICH_V6_GPIO,
},
[LPC_ICH6W] = {
.name = "ICH6W or ICH6RW",
.iTCO_version = 2,
.gpio_version = ICH_V6_GPIO,
},
[LPC_631XESB] = {
.name = "631xESB/632xESB",
.iTCO_version = 2,
.gpio_version = ICH_V6_GPIO,
},
[LPC_ICH7] = {
.name = "ICH7 or ICH7R",
.iTCO_version = 2,
.gpio_version = ICH_V7_GPIO,
},
[LPC_ICH7DH] = {
.name = "ICH7DH",
.iTCO_version = 2,
.gpio_version = ICH_V7_GPIO,
},
[LPC_ICH7M] = {
.name = "ICH7-M or ICH7-U",
.iTCO_version = 2,
.gpio_version = ICH_V7_GPIO,
},
[LPC_ICH7MDH] = {
.name = "ICH7-M DH",
.iTCO_version = 2,
.gpio_version = ICH_V7_GPIO,
},
[LPC_NM10] = {
.name = "NM10",
.iTCO_version = 2,
.gpio_version = ICH_V7_GPIO,
},
[LPC_ICH8] = {
.name = "ICH8 or ICH8R",
.iTCO_version = 2,
.gpio_version = ICH_V7_GPIO,
},
[LPC_ICH8DH] = {
.name = "ICH8DH",
.iTCO_version = 2,
.gpio_version = ICH_V7_GPIO,
},
[LPC_ICH8DO] = {
.name = "ICH8DO",
.iTCO_version = 2,
.gpio_version = ICH_V7_GPIO,
},
[LPC_ICH8M] = {
.name = "ICH8M",
.iTCO_version = 2,
.gpio_version = ICH_V7_GPIO,
},
[LPC_ICH8ME] = {
.name = "ICH8M-E",
.iTCO_version = 2,
.gpio_version = ICH_V7_GPIO,
},
[LPC_ICH9] = {
.name = "ICH9",
.iTCO_version = 2,
.gpio_version = ICH_V9_GPIO,
},
[LPC_ICH9R] = {
.name = "ICH9R",
.iTCO_version = 2,
.gpio_version = ICH_V9_GPIO,
},
[LPC_ICH9DH] = {
.name = "ICH9DH",
.iTCO_version = 2,
.gpio_version = ICH_V9_GPIO,
},
[LPC_ICH9DO] = {
.name = "ICH9DO",
.iTCO_version = 2,
.gpio_version = ICH_V9_GPIO,
},
[LPC_ICH9M] = {
.name = "ICH9M",
.iTCO_version = 2,
.gpio_version = ICH_V9_GPIO,
},
[LPC_ICH9ME] = {
.name = "ICH9M-E",
.iTCO_version = 2,
.gpio_version = ICH_V9_GPIO,
},
[LPC_ICH10] = {
.name = "ICH10",
.iTCO_version = 2,
.gpio_version = ICH_V10CONS_GPIO,
},
[LPC_ICH10R] = {
.name = "ICH10R",
.iTCO_version = 2,
.gpio_version = ICH_V10CONS_GPIO,
},
[LPC_ICH10D] = {
.name = "ICH10D",
.iTCO_version = 2,
.gpio_version = ICH_V10CORP_GPIO,
},
[LPC_ICH10DO] = {
.name = "ICH10DO",
.iTCO_version = 2,
.gpio_version = ICH_V10CORP_GPIO,
},
[LPC_PCH] = {
.name = "PCH Desktop Full Featured",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_PCHM] = {
.name = "PCH Mobile Full Featured",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_P55] = {
.name = "P55",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_PM55] = {
.name = "PM55",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_H55] = {
.name = "H55",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_QM57] = {
.name = "QM57",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_H57] = {
.name = "H57",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_HM55] = {
.name = "HM55",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_Q57] = {
.name = "Q57",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_HM57] = {
.name = "HM57",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_PCHMSFF] = {
.name = "PCH Mobile SFF Full Featured",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_QS57] = {
.name = "QS57",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_3400] = {
.name = "3400",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_3420] = {
.name = "3420",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_3450] = {
.name = "3450",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_EP80579] = {
.name = "EP80579",
.iTCO_version = 2,
},
[LPC_CPT] = {
.name = "Cougar Point",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_CPTD] = {
.name = "Cougar Point Desktop",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_CPTM] = {
.name = "Cougar Point Mobile",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_PBG] = {
.name = "Patsburg",
.iTCO_version = 2,
},
[LPC_DH89XXCC] = {
.name = "DH89xxCC",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_PPT] = {
.name = "Panther Point",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_LPT] = {
.name = "Lynx Point",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
.spi_type = INTEL_SPI_LPT,
},
[LPC_LPT_LP] = {
.name = "Lynx Point_LP",
.iTCO_version = 2,
.spi_type = INTEL_SPI_LPT,
},
[LPC_WBG] = {
.name = "Wellsburg",
.iTCO_version = 2,
},
[LPC_AVN] = {
.name = "Avoton SoC",
.iTCO_version = 3,
.gpio_version = AVOTON_GPIO,
.spi_type = INTEL_SPI_BYT,
},
[LPC_BAYTRAIL] = {
.name = "Bay Trail SoC",
.iTCO_version = 3,
.spi_type = INTEL_SPI_BYT,
},
[LPC_COLETO] = {
.name = "Coleto Creek",
.iTCO_version = 2,
},
[LPC_WPT_LP] = {
.name = "Wildcat Point_LP",
.iTCO_version = 2,
.spi_type = INTEL_SPI_LPT,
},
[LPC_BRASWELL] = {
.name = "Braswell SoC",
.iTCO_version = 3,
.spi_type = INTEL_SPI_BYT,
},
[LPC_LEWISBURG] = {
.name = "Lewisburg",
.iTCO_version = 2,
},
[LPC_9S] = {
.name = "9 Series",
.iTCO_version = 2,
.gpio_version = ICH_V5_GPIO,
},
[LPC_APL] = {
.name = "Apollo Lake SoC",
.iTCO_version = 5,
.spi_type = INTEL_SPI_BXT,
},
[LPC_GLK] = {
.name = "Gemini Lake SoC",
.spi_type = INTEL_SPI_BXT,
},
[LPC_COUGARMOUNTAIN] = {
.name = "Cougar Mountain SoC",
.iTCO_version = 3,
},
};
/*
* This data only exists for exporting the supported PCI ids
* via MODULE_DEVICE_TABLE. We do not actually register a
* pci_driver, because the I/O Controller Hub has also other
* functions that probably will be registered by other drivers.
*/
static const struct pci_device_id lpc_ich_ids[] = {
{ PCI_VDEVICE(INTEL, 0x0f1c), LPC_BAYTRAIL},
{ PCI_VDEVICE(INTEL, 0x1c41), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c42), LPC_CPTD},
{ PCI_VDEVICE(INTEL, 0x1c43), LPC_CPTM},
{ PCI_VDEVICE(INTEL, 0x1c44), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c45), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c46), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c47), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c48), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c49), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c4a), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c4b), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c4c), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c4d), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c4e), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c4f), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c50), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c51), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c52), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c53), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c54), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c55), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c56), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c57), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c58), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c59), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c5a), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c5b), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c5c), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c5d), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c5e), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1c5f), LPC_CPT},
{ PCI_VDEVICE(INTEL, 0x1d40), LPC_PBG},
{ PCI_VDEVICE(INTEL, 0x1d41), LPC_PBG},
{ PCI_VDEVICE(INTEL, 0x1e40), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e41), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e42), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e43), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e44), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e45), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e46), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e47), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e48), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e49), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e4a), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e4b), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e4c), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e4d), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e4e), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e4f), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e50), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e51), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e52), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e53), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e54), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e55), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e56), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e57), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e58), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e59), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e5a), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e5b), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e5c), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e5d), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e5e), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1e5f), LPC_PPT},
{ PCI_VDEVICE(INTEL, 0x1f38), LPC_AVN},
{ PCI_VDEVICE(INTEL, 0x1f39), LPC_AVN},
{ PCI_VDEVICE(INTEL, 0x1f3a), LPC_AVN},
{ PCI_VDEVICE(INTEL, 0x1f3b), LPC_AVN},
{ PCI_VDEVICE(INTEL, 0x229c), LPC_BRASWELL},
{ PCI_VDEVICE(INTEL, 0x2310), LPC_DH89XXCC},
{ PCI_VDEVICE(INTEL, 0x2390), LPC_COLETO},
{ PCI_VDEVICE(INTEL, 0x2410), LPC_ICH},
{ PCI_VDEVICE(INTEL, 0x2420), LPC_ICH0},
{ PCI_VDEVICE(INTEL, 0x2440), LPC_ICH2},
{ PCI_VDEVICE(INTEL, 0x244c), LPC_ICH2M},
{ PCI_VDEVICE(INTEL, 0x2450), LPC_CICH},
{ PCI_VDEVICE(INTEL, 0x2480), LPC_ICH3},
{ PCI_VDEVICE(INTEL, 0x248c), LPC_ICH3M},
{ PCI_VDEVICE(INTEL, 0x24c0), LPC_ICH4},
{ PCI_VDEVICE(INTEL, 0x24cc), LPC_ICH4M},
{ PCI_VDEVICE(INTEL, 0x24d0), LPC_ICH5},
{ PCI_VDEVICE(INTEL, 0x25a1), LPC_6300ESB},
{ PCI_VDEVICE(INTEL, 0x2640), LPC_ICH6},
{ PCI_VDEVICE(INTEL, 0x2641), LPC_ICH6M},
{ PCI_VDEVICE(INTEL, 0x2642), LPC_ICH6W},
{ PCI_VDEVICE(INTEL, 0x2670), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x2671), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x2672), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x2673), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x2674), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x2675), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x2676), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x2677), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x2678), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x2679), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x267a), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x267b), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x267c), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x267d), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x267e), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x267f), LPC_631XESB},
{ PCI_VDEVICE(INTEL, 0x27b0), LPC_ICH7DH},
{ PCI_VDEVICE(INTEL, 0x27b8), LPC_ICH7},
{ PCI_VDEVICE(INTEL, 0x27b9), LPC_ICH7M},
{ PCI_VDEVICE(INTEL, 0x27bc), LPC_NM10},
{ PCI_VDEVICE(INTEL, 0x27bd), LPC_ICH7MDH},
{ PCI_VDEVICE(INTEL, 0x2810), LPC_ICH8},
{ PCI_VDEVICE(INTEL, 0x2811), LPC_ICH8ME},
{ PCI_VDEVICE(INTEL, 0x2812), LPC_ICH8DH},
{ PCI_VDEVICE(INTEL, 0x2814), LPC_ICH8DO},
{ PCI_VDEVICE(INTEL, 0x2815), LPC_ICH8M},
{ PCI_VDEVICE(INTEL, 0x2912), LPC_ICH9DH},
{ PCI_VDEVICE(INTEL, 0x2914), LPC_ICH9DO},
{ PCI_VDEVICE(INTEL, 0x2916), LPC_ICH9R},
{ PCI_VDEVICE(INTEL, 0x2917), LPC_ICH9ME},
{ PCI_VDEVICE(INTEL, 0x2918), LPC_ICH9},
{ PCI_VDEVICE(INTEL, 0x2919), LPC_ICH9M},
{ PCI_VDEVICE(INTEL, 0x3197), LPC_GLK},
{ PCI_VDEVICE(INTEL, 0x2b9c), LPC_COUGARMOUNTAIN},
{ PCI_VDEVICE(INTEL, 0x3a14), LPC_ICH10DO},
{ PCI_VDEVICE(INTEL, 0x3a16), LPC_ICH10R},
{ PCI_VDEVICE(INTEL, 0x3a18), LPC_ICH10},
{ PCI_VDEVICE(INTEL, 0x3a1a), LPC_ICH10D},
{ PCI_VDEVICE(INTEL, 0x3b00), LPC_PCH},
{ PCI_VDEVICE(INTEL, 0x3b01), LPC_PCHM},
{ PCI_VDEVICE(INTEL, 0x3b02), LPC_P55},
{ PCI_VDEVICE(INTEL, 0x3b03), LPC_PM55},
{ PCI_VDEVICE(INTEL, 0x3b06), LPC_H55},
{ PCI_VDEVICE(INTEL, 0x3b07), LPC_QM57},
{ PCI_VDEVICE(INTEL, 0x3b08), LPC_H57},
{ PCI_VDEVICE(INTEL, 0x3b09), LPC_HM55},
{ PCI_VDEVICE(INTEL, 0x3b0a), LPC_Q57},
{ PCI_VDEVICE(INTEL, 0x3b0b), LPC_HM57},
{ PCI_VDEVICE(INTEL, 0x3b0d), LPC_PCHMSFF},
{ PCI_VDEVICE(INTEL, 0x3b0f), LPC_QS57},
{ PCI_VDEVICE(INTEL, 0x3b12), LPC_3400},
{ PCI_VDEVICE(INTEL, 0x3b14), LPC_3420},
{ PCI_VDEVICE(INTEL, 0x3b16), LPC_3450},
{ PCI_VDEVICE(INTEL, 0x5031), LPC_EP80579},
{ PCI_VDEVICE(INTEL, 0x5ae8), LPC_APL},
{ PCI_VDEVICE(INTEL, 0x8c40), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c41), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c42), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c43), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c44), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c45), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c46), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c47), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c48), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c49), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c4a), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c4b), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c4c), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c4d), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c4e), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c4f), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c50), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c51), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c52), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c53), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c54), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c55), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c56), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c57), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c58), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c59), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c5a), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c5b), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c5c), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c5d), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c5e), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8c5f), LPC_LPT},
{ PCI_VDEVICE(INTEL, 0x8cc1), LPC_9S},
{ PCI_VDEVICE(INTEL, 0x8cc2), LPC_9S},
{ PCI_VDEVICE(INTEL, 0x8cc3), LPC_9S},
{ PCI_VDEVICE(INTEL, 0x8cc4), LPC_9S},
{ PCI_VDEVICE(INTEL, 0x8cc6), LPC_9S},
{ PCI_VDEVICE(INTEL, 0x8d40), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d41), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d42), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d43), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d44), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d45), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d46), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d47), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d48), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d49), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d4a), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d4b), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d4c), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d4d), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d4e), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d4f), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d50), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d51), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d52), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d53), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d54), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d55), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d56), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d57), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d58), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d59), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d5a), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d5b), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d5c), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d5d), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d5e), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x8d5f), LPC_WBG},
{ PCI_VDEVICE(INTEL, 0x9c40), LPC_LPT_LP},
{ PCI_VDEVICE(INTEL, 0x9c41), LPC_LPT_LP},
{ PCI_VDEVICE(INTEL, 0x9c42), LPC_LPT_LP},
{ PCI_VDEVICE(INTEL, 0x9c43), LPC_LPT_LP},
{ PCI_VDEVICE(INTEL, 0x9c44), LPC_LPT_LP},
{ PCI_VDEVICE(INTEL, 0x9c45), LPC_LPT_LP},
{ PCI_VDEVICE(INTEL, 0x9c46), LPC_LPT_LP},
{ PCI_VDEVICE(INTEL, 0x9c47), LPC_LPT_LP},
{ PCI_VDEVICE(INTEL, 0x9cc1), LPC_WPT_LP},
{ PCI_VDEVICE(INTEL, 0x9cc2), LPC_WPT_LP},
{ PCI_VDEVICE(INTEL, 0x9cc3), LPC_WPT_LP},
{ PCI_VDEVICE(INTEL, 0x9cc5), LPC_WPT_LP},
{ PCI_VDEVICE(INTEL, 0x9cc6), LPC_WPT_LP},
{ PCI_VDEVICE(INTEL, 0x9cc7), LPC_WPT_LP},
{ PCI_VDEVICE(INTEL, 0x9cc9), LPC_WPT_LP},
{ PCI_VDEVICE(INTEL, 0xa1c1), LPC_LEWISBURG},
{ PCI_VDEVICE(INTEL, 0xa1c2), LPC_LEWISBURG},
{ PCI_VDEVICE(INTEL, 0xa1c3), LPC_LEWISBURG},
{ PCI_VDEVICE(INTEL, 0xa1c4), LPC_LEWISBURG},
{ PCI_VDEVICE(INTEL, 0xa1c5), LPC_LEWISBURG},
{ PCI_VDEVICE(INTEL, 0xa1c6), LPC_LEWISBURG},
{ PCI_VDEVICE(INTEL, 0xa1c7), LPC_LEWISBURG},
{ PCI_VDEVICE(INTEL, 0xa242), LPC_LEWISBURG},
{ PCI_VDEVICE(INTEL, 0xa243), LPC_LEWISBURG},
{ 0, }, /* End of list */
};
MODULE_DEVICE_TABLE(pci, lpc_ich_ids);
static void lpc_ich_restore_config_space(struct pci_dev *dev)
{
struct lpc_ich_priv *priv = pci_get_drvdata(dev);
if (priv->abase_save >= 0) {
pci_write_config_byte(dev, priv->abase, priv->abase_save);
priv->abase_save = -1;
}
if (priv->actrl_pbase_save >= 0) {
pci_write_config_byte(dev, priv->actrl_pbase,
priv->actrl_pbase_save);
priv->actrl_pbase_save = -1;
}
if (priv->gctrl_save >= 0) {
pci_write_config_byte(dev, priv->gctrl, priv->gctrl_save);
priv->gctrl_save = -1;
}
}
static void lpc_ich_enable_acpi_space(struct pci_dev *dev)
{
struct lpc_ich_priv *priv = pci_get_drvdata(dev);
u8 reg_save;
switch (lpc_chipset_info[priv->chipset].iTCO_version) {
case 3:
/*
* Some chipsets (eg Avoton) enable the ACPI space in the
* ACPI BASE register.
*/
pci_read_config_byte(dev, priv->abase, &reg_save);
pci_write_config_byte(dev, priv->abase, reg_save | 0x2);
priv->abase_save = reg_save;
break;
default:
/*
* Most chipsets enable the ACPI space in the ACPI control
* register.
*/
pci_read_config_byte(dev, priv->actrl_pbase, &reg_save);
pci_write_config_byte(dev, priv->actrl_pbase, reg_save | 0x80);
priv->actrl_pbase_save = reg_save;
break;
}
}
static void lpc_ich_enable_gpio_space(struct pci_dev *dev)
{
struct lpc_ich_priv *priv = pci_get_drvdata(dev);
u8 reg_save;
pci_read_config_byte(dev, priv->gctrl, &reg_save);
pci_write_config_byte(dev, priv->gctrl, reg_save | 0x10);
priv->gctrl_save = reg_save;
}
static void lpc_ich_enable_pmc_space(struct pci_dev *dev)
{
struct lpc_ich_priv *priv = pci_get_drvdata(dev);
u8 reg_save;
pci_read_config_byte(dev, priv->actrl_pbase, &reg_save);
pci_write_config_byte(dev, priv->actrl_pbase, reg_save | 0x2);
priv->actrl_pbase_save = reg_save;
}
static int lpc_ich_finalize_wdt_cell(struct pci_dev *dev)
{
struct itco_wdt_platform_data *pdata;
struct lpc_ich_priv *priv = pci_get_drvdata(dev);
struct lpc_ich_info *info;
struct mfd_cell *cell = &lpc_ich_wdt_cell;
pdata = devm_kzalloc(&dev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
info = &lpc_chipset_info[priv->chipset];
pdata->version = info->iTCO_version;
strlcpy(pdata->name, info->name, sizeof(pdata->name));
cell->platform_data = pdata;
cell->pdata_size = sizeof(*pdata);
return 0;
}
static void lpc_ich_finalize_gpio_cell(struct pci_dev *dev)
{
struct lpc_ich_priv *priv = pci_get_drvdata(dev);
struct mfd_cell *cell = &lpc_ich_gpio_cell;
cell->platform_data = &lpc_chipset_info[priv->chipset];
cell->pdata_size = sizeof(struct lpc_ich_info);
}
/*
* We don't check for resource conflict globally. There are 2 or 3 independent
* GPIO groups and it's enough to have access to one of these to instantiate
* the device.
*/
static int lpc_ich_check_conflict_gpio(struct resource *res)
{
int ret;
u8 use_gpio = 0;
if (resource_size(res) >= 0x50 &&
!acpi_check_region(res->start + 0x40, 0x10, "LPC ICH GPIO3"))
use_gpio |= 1 << 2;
if (!acpi_check_region(res->start + 0x30, 0x10, "LPC ICH GPIO2"))
use_gpio |= 1 << 1;
ret = acpi_check_region(res->start + 0x00, 0x30, "LPC ICH GPIO1");
if (!ret)
use_gpio |= 1 << 0;
return use_gpio ? use_gpio : ret;
}
static int lpc_ich_init_gpio(struct pci_dev *dev)
{
struct lpc_ich_priv *priv = pci_get_drvdata(dev);
u32 base_addr_cfg;
u32 base_addr;
int ret;
bool acpi_conflict = false;
struct resource *res;
/* Setup power management base register */
pci_read_config_dword(dev, priv->abase, &base_addr_cfg);
base_addr = base_addr_cfg & 0x0000ff80;
if (!base_addr) {
dev_notice(&dev->dev, "I/O space for ACPI uninitialized\n");
lpc_ich_gpio_cell.num_resources--;
goto gpe0_done;
}
res = &gpio_ich_res[ICH_RES_GPE0];
res->start = base_addr + ACPIBASE_GPE_OFF;
res->end = base_addr + ACPIBASE_GPE_END;
ret = acpi_check_resource_conflict(res);
if (ret) {
/*
* This isn't fatal for the GPIO, but we have to make sure that
* the platform_device subsystem doesn't see this resource
* or it will register an invalid region.
*/
lpc_ich_gpio_cell.num_resources--;
acpi_conflict = true;
} else {
lpc_ich_enable_acpi_space(dev);
}
gpe0_done:
/* Setup GPIO base register */
pci_read_config_dword(dev, priv->gbase, &base_addr_cfg);
base_addr = base_addr_cfg & 0x0000ff80;
if (!base_addr) {
dev_notice(&dev->dev, "I/O space for GPIO uninitialized\n");
ret = -ENODEV;
goto gpio_done;
}
/* Older devices provide fewer GPIO and have a smaller resource size. */
res = &gpio_ich_res[ICH_RES_GPIO];
res->start = base_addr;
switch (lpc_chipset_info[priv->chipset].gpio_version) {
case ICH_V5_GPIO:
case ICH_V10CORP_GPIO:
res->end = res->start + 128 - 1;
break;
default:
res->end = res->start + 64 - 1;
break;
}
ret = lpc_ich_check_conflict_gpio(res);
if (ret < 0) {
/* this isn't necessarily fatal for the GPIO */
acpi_conflict = true;
goto gpio_done;
}
lpc_chipset_info[priv->chipset].use_gpio = ret;
lpc_ich_enable_gpio_space(dev);
lpc_ich_finalize_gpio_cell(dev);
ret = mfd_add_devices(&dev->dev, PLATFORM_DEVID_AUTO,
&lpc_ich_gpio_cell, 1, NULL, 0, NULL);
gpio_done:
if (acpi_conflict)
pr_warn("Resource conflict(s) found affecting %s\n",
lpc_ich_gpio_cell.name);
return ret;
}
static int lpc_ich_init_wdt(struct pci_dev *dev)
{
struct lpc_ich_priv *priv = pci_get_drvdata(dev);
u32 base_addr_cfg;
u32 base_addr;
int ret;
struct resource *res;
/* If we have ACPI based watchdog use that instead */
if (acpi_has_watchdog())
return -ENODEV;
/* Setup power management base register */
pci_read_config_dword(dev, priv->abase, &base_addr_cfg);
base_addr = base_addr_cfg & 0x0000ff80;
if (!base_addr) {
dev_notice(&dev->dev, "I/O space for ACPI uninitialized\n");
ret = -ENODEV;
goto wdt_done;
}
res = wdt_io_res(ICH_RES_IO_TCO);
res->start = base_addr + ACPIBASE_TCO_OFF;
res->end = base_addr + ACPIBASE_TCO_END;
res = wdt_io_res(ICH_RES_IO_SMI);
res->start = base_addr + ACPIBASE_SMI_OFF;
res->end = base_addr + ACPIBASE_SMI_END;
lpc_ich_enable_acpi_space(dev);
/*
* iTCO v2:
* Get the Memory-Mapped GCS register. To get access to it
* we have to read RCBA from PCI Config space 0xf0 and use
* it as base. GCS = RCBA + ICH6_GCS(0x3410).
*
* iTCO v3:
* Get the Power Management Configuration register. To get access
* to it we have to read the PMC BASE from config space and address
* the register at offset 0x8.
*/
if (lpc_chipset_info[priv->chipset].iTCO_version == 1) {
/* Don't register iomem for TCO ver 1 */
lpc_ich_wdt_cell.num_resources--;
} else if (lpc_chipset_info[priv->chipset].iTCO_version == 2) {
pci_read_config_dword(dev, RCBABASE, &base_addr_cfg);
base_addr = base_addr_cfg & 0xffffc000;
if (!(base_addr_cfg & 1)) {
dev_notice(&dev->dev, "RCBA is disabled by "
"hardware/BIOS, device disabled\n");
ret = -ENODEV;
goto wdt_done;
}
res = wdt_mem_res(ICH_RES_MEM_GCS_PMC);
res->start = base_addr + ACPIBASE_GCS_OFF;
res->end = base_addr + ACPIBASE_GCS_END;
} else if (lpc_chipset_info[priv->chipset].iTCO_version == 3) {
lpc_ich_enable_pmc_space(dev);
pci_read_config_dword(dev, ACPICTRL_PMCBASE, &base_addr_cfg);
base_addr = base_addr_cfg & 0xfffffe00;
res = wdt_mem_res(ICH_RES_MEM_GCS_PMC);
res->start = base_addr + ACPIBASE_PMC_OFF;
res->end = base_addr + ACPIBASE_PMC_END;
}
ret = lpc_ich_finalize_wdt_cell(dev);
if (ret)
goto wdt_done;
ret = mfd_add_devices(&dev->dev, PLATFORM_DEVID_AUTO,
&lpc_ich_wdt_cell, 1, NULL, 0, NULL);
wdt_done:
return ret;
}
static bool lpc_ich_byt_set_writeable(void __iomem *base, void *data)
{
u32 val;
val = readl(base + BYT_BCR);
if (!(val & BYT_BCR_WPD)) {
val |= BYT_BCR_WPD;
writel(val, base + BYT_BCR);
val = readl(base + BYT_BCR);
}
return val & BYT_BCR_WPD;
}
static bool lpc_ich_lpt_set_writeable(void __iomem *base, void *data)
{
struct pci_dev *pdev = data;
u32 bcr;
pci_read_config_dword(pdev, BCR, &bcr);
if (!(bcr & BCR_WPD)) {
bcr |= BCR_WPD;
pci_write_config_dword(pdev, BCR, bcr);
pci_read_config_dword(pdev, BCR, &bcr);
}
return bcr & BCR_WPD;
}
static bool lpc_ich_bxt_set_writeable(void __iomem *base, void *data)
{
unsigned int spi = PCI_DEVFN(13, 2);
struct pci_bus *bus = data;
u32 bcr;
pci_bus_read_config_dword(bus, spi, BCR, &bcr);
if (!(bcr & BCR_WPD)) {
bcr |= BCR_WPD;
pci_bus_write_config_dword(bus, spi, BCR, bcr);
pci_bus_read_config_dword(bus, spi, BCR, &bcr);
}
return bcr & BCR_WPD;
}
static int lpc_ich_init_spi(struct pci_dev *dev)
{
struct lpc_ich_priv *priv = pci_get_drvdata(dev);
struct resource *res = &intel_spi_res[0];
struct intel_spi_boardinfo *info;
u32 spi_base, rcba;
info = devm_kzalloc(&dev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->type = lpc_chipset_info[priv->chipset].spi_type;
switch (info->type) {
case INTEL_SPI_BYT:
pci_read_config_dword(dev, SPIBASE_BYT, &spi_base);
if (spi_base & SPIBASE_BYT_EN) {
res->start = spi_base & ~(SPIBASE_BYT_SZ - 1);
res->end = res->start + SPIBASE_BYT_SZ - 1;
info->set_writeable = lpc_ich_byt_set_writeable;
}
break;
case INTEL_SPI_LPT:
pci_read_config_dword(dev, RCBABASE, &rcba);
if (rcba & 1) {
spi_base = round_down(rcba, SPIBASE_LPT_SZ);
res->start = spi_base + SPIBASE_LPT;
res->end = res->start + SPIBASE_LPT_SZ - 1;
info->set_writeable = lpc_ich_lpt_set_writeable;
info->data = dev;
}
break;
case INTEL_SPI_BXT: {
unsigned int p2sb = PCI_DEVFN(13, 0);
unsigned int spi = PCI_DEVFN(13, 2);
struct pci_bus *bus = dev->bus;
/*
* The P2SB is hidden by BIOS and we need to unhide it in
* order to read BAR of the SPI flash device. Once that is
* done we hide it again.
*/
pci_bus_write_config_byte(bus, p2sb, 0xe1, 0x0);
pci_bus_read_config_dword(bus, spi, PCI_BASE_ADDRESS_0,
&spi_base);
if (spi_base != ~0) {
res->start = spi_base & 0xfffffff0;
res->end = res->start + SPIBASE_APL_SZ - 1;
info->set_writeable = lpc_ich_bxt_set_writeable;
info->data = bus;
}
pci_bus_write_config_byte(bus, p2sb, 0xe1, 0x1);
break;
}
default:
return -EINVAL;
}
if (!res->start)
return -ENODEV;
lpc_ich_spi_cell.platform_data = info;
lpc_ich_spi_cell.pdata_size = sizeof(*info);
return mfd_add_devices(&dev->dev, PLATFORM_DEVID_NONE,
&lpc_ich_spi_cell, 1, NULL, 0, NULL);
}
static int lpc_ich_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
struct lpc_ich_priv *priv;
int ret;
bool cell_added = false;
priv = devm_kzalloc(&dev->dev,
sizeof(struct lpc_ich_priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->chipset = id->driver_data;
priv->actrl_pbase_save = -1;
priv->abase_save = -1;
priv->abase = ACPIBASE;
priv->actrl_pbase = ACPICTRL_PMCBASE;
priv->gctrl_save = -1;
if (priv->chipset <= LPC_ICH5) {
priv->gbase = GPIOBASE_ICH0;
priv->gctrl = GPIOCTRL_ICH0;
} else {
priv->gbase = GPIOBASE_ICH6;
priv->gctrl = GPIOCTRL_ICH6;
}
pci_set_drvdata(dev, priv);
if (lpc_chipset_info[priv->chipset].iTCO_version) {
ret = lpc_ich_init_wdt(dev);
if (!ret)
cell_added = true;
}
if (lpc_chipset_info[priv->chipset].gpio_version) {
ret = lpc_ich_init_gpio(dev);
if (!ret)
cell_added = true;
}
if (lpc_chipset_info[priv->chipset].spi_type) {
ret = lpc_ich_init_spi(dev);
if (!ret)
cell_added = true;
}
/*
* We only care if at least one or none of the cells registered
* successfully.
*/
if (!cell_added) {
dev_warn(&dev->dev, "No MFD cells added\n");
lpc_ich_restore_config_space(dev);
return -ENODEV;
}
return 0;
}
static void lpc_ich_remove(struct pci_dev *dev)
{
mfd_remove_devices(&dev->dev);
lpc_ich_restore_config_space(dev);
}
static struct pci_driver lpc_ich_driver = {
.name = "lpc_ich",
.id_table = lpc_ich_ids,
.probe = lpc_ich_probe,
.remove = lpc_ich_remove,
};
module_pci_driver(lpc_ich_driver);
MODULE_AUTHOR("Aaron Sierra <asierra@xes-inc.com>");
MODULE_DESCRIPTION("LPC interface for Intel ICH");
MODULE_LICENSE("GPL");
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